J. V. BELL, A FEDERAL AGENT WHO INVESTIGATED THE 1920 LONGSHOREMEN'S strike in Galveston, Texas, expressed alarm over militancy of island's black and white workers, which had prompted Governor William P. Hobby on June 7 to declare martial law on island. It was expression of class and racial assertiveness by black unionists that particularly disturbed Bell. He attributed this militancy to their long association with white trade unionists, even though Galveston's longshoreman locals, like other southern locals of International Longshoremen's Association (ILA), were racially segregated. In a report from Galveston on August 21, 1920, Bell complained, negroes in Galveston, through their long association on an equality basis with white Union Labor, have about arrived at time where they think they should be accepted on a par or equal with white race. He warned that the insolent manner of local African Americans toward white race will, in time, lead to serious disorders between races. In fact, he reported indignantly, I have never been in any city where negroes are so impudent and insolent as they are in Galveston. (1) Bell's racism notwithstanding, he did put his finger on an important source of black longshoremen's assertiveness. Despite degradations of Jim Crow and institutionalized racism at time, including in labor movement, biracial unionism--that is, organization of black and white workers into segregated locals--had given longshoremen a sense of empowerment. Of course, this was not what architects of racial segregation had anticipated, but as Bell suggested, cooperation with white unionists on docks generated a militancy that reached its fullest expression during strike. The crushing defeat inflicted on striking longshoremen, after months of martial law, suspension of Galveston's entire police force and city government, and occupation by Texas militia, was a major setback for Texas labor movement and those who had used biracial unionism to promote organized labor and civil rights in South. Racial cooperation on waterfront extended to politics as well. Although militancy of Galveston's black longshoremen was part of a national pattern in First World War era, black working-class participation in city politics provided another vibrant source of empowerment. (2) Black longshoremen formed an important activist bloc in a prolabor, reform-minded political coalition that captured power in 1919 city elections and again in 1921. At a time when many African Americans and poor whites in South were being disenfranchised through poll taxes, white primary, and other devices, black unionists in Galveston asserted themselves on waterfront, joined struggle against Jim Crow, and engaged in formal political process. The failure of strike of 1920 strained race relations and led to collapse of ILA locals by mid-decade, but black and white longshoremen continued their cooperation after strike, including an attempt to form an independent labor party in elections of 1920. The dockworkers' political and union activism did more than strain race relations, however; it also sharpened intraracial divisions in Galveston's black community. The literature on longshoremen's strike to date has not examined role of black, or even white, working-class politics before, during, and after strike. Until recently, in fact, black labor activism and experiences of black urban workers, including those on Galveston's waterfront, had remained largely hidden, ignored, or marginal at best in studies of southern labor and black history. Eric Arnesen has pointed out that just as labor history has had something of a 'race' problem, African-American history too has had its own 'class' or 'labor' problem. (3) Due particularly to works by Arnesen, Michael K. Honey, Tera W. Hunter, Robin D. …